SOLUTION: I'm struggling with this question regarding binomial probability. Can you please help me? A shipment of 24 computer keyboards is rejected if 4 are checked fir defects and at le

Algebra ->  Probability-and-statistics -> SOLUTION: I'm struggling with this question regarding binomial probability. Can you please help me? A shipment of 24 computer keyboards is rejected if 4 are checked fir defects and at le      Log On


   

Question 372798: I'm struggling with this question regarding binomial probability. Can you please help me?
A shipment of 24 computer keyboards is rejected if 4 are checked fir defects and at least 1 is found to be defective. Find the probability that the shipment will be returned if there are actually 6 defective keyboards.

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
ways of selecting 4 out of 24 ___ 24C4

ways of selecting 4 good out of 18 good ___ 18C4

probability of none bad ___ (18C4) / (24C4)

probability of at least one bad (return) ___ 1 - [(18C4) / (24C4)]